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1.21ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 587305986

Shape and cutting style on the report: Round brilliant

Certificate IGI 587305986

Diamond specifications and retailer prices

From $1,311 USD
As of November 5, 2026
Save $2,141 USD (62%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,452 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 587305986. Listed at 12 retailers as of November 5, 2026, with prices from $1,311 to $3,452, a $2,141 spread on the same certified stone. NZ Jewellers lists it at $3,452. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
K
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 587305986
Dimensions6.83 × 6.75 × 4.26 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown
Top View
6.83 mm6.75 mm1.21 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 587305986
Side View
Table 58.0%Crown 34.8°Girdle: MediumPavilion 41.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,452 USD|Low: $1,294 USD|High: $3,452 USD|Avg: $1,694 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 5, 2026
Retailer 3$1,310 USD
Retailer 11$1,311 USD
Retailer 5$1,403 USD
Retailer 12$1,415 USD
Retailer 14$1,415 USD
Retailer 4$1,456 USD
Retailer 13$1,481 USD
Retailer 10$1,633 USD
Retailer 6$1,661 USD
Retailer 2$1,682 USD
Retailer 8$1,844 USD
Retailer 7$1,957 USD
Retailer 9$2,592 USD
NZ Jewellers$3,452 USD

32 data points across 14 retailers

12 retailers$1,311 USD to $3,452 USD

Retailer 1
-
$1,310 USD
Price last confirmed 43 days ago
A
Retailer 2
-
$1,311 USD
View
A
Retailer 3
-
$1,415 USD
View
Retailer 4
-
$1,415 USD
View
Price last confirmed 8 days ago
Retailer 5
-
$1,456 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$1,481 USD
View
B+
Retailer 7
-
$1,633 USD
View
A
Retailer 8
-
$1,682 USD
View
A
Retailer 9
-
$1,844 USD
View
B+
Retailer 10
-
$1,957 USD
View
B+
Retailer 11
-
$2,592 USD
View
Most Expensive
B
NZ Jewellers
f93b802b-2bdf-48fe-8749-353543e40829 · Nov 5
$3,452 USD
View
11 more retailers have this diamond
Prices start from $1,311 USDSave up to $2,141 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.21ct Round
$1,311 USD